[SI-LIST] SSTL doubts
- From: Canes Venatici <starsilic@xxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Fri, 19 Jan 2007 01:55:22 -0800 (PST)
Hi all,
This is with reference to the JEDEC standard No. 8-9B of SSTL_2 interface.
On Table4, I could see terms like Vtt (WC) and VTT(min) & VTT(max).
For finding the maximum on resistance of driver, it uses Vtt(WC).
I want to know, why we can't take VTT(min) as that may be realistic as
Vtt is what connected as termination voltage.
It specifies, for o/p high drive,
Vtt (WC) = Vref(max) - 40mV.
Vtt(min) = Vref(min) - 40mV.
The same is applicable for o/p low drive also.
Could anyone clarify this.
Regards,
Canes
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